The onStep project was started by Howard Dutton and provides not just open source code used to drive all those telescopes but also excellent support on its forum. Last but not least - and imho most important benefit - it provides quite easy way to revive all those erratic commercial mounts where electronics often dies and replacement is expensive or impossible. Open those graves and do it - convert them to onStep! So you should consider to support Howard with some money to help him continue. I proudly did and so should you!

There is official resource for onStep available. It very good and growing. Go there and read all. And then do it again. And again. You will probably do that for 20 times - don't worry it's OK if you are not electro-engineer ;)  

This site is another story. Topics covered by onStep site are not easy to jump in. Lot of users do not know much about stepper motors, 3d boards, electronics and get easily lost (as I am). So I try to put here stuff I was fighting with during my dive into onStep world. I decided to experiment with all variants of the HW as it seems to be very usable stuff also for other projects. No reason for that maybe - if I got my FYSETC board, some TMC5160 drivers, power source and it is almost done for observing. But I like to get wider knowledge about the topic and also would like to see all variants in action.

There is also other good reason for me to start this page. Official forum have limited lifespan of images/videos attached to posts. So after some time those valuable infos are lost which is wrong I think. This topic will probably live much much longer in astro community so maybe this longterm page can be used many years from now without any important data deleted by some automatic job on groups.io. Good luck to your dive into onStep and clear skies...